Pulp-separator.



B. J. NOYES.

PULP SEPARATOR.

APPLICATION TILED JUNE 14,1907.

916,481 v Patented Mar. 30, 1909.

C a; H4

c F 21 f 2 7 Z a 4 6L i 1- i witnesses:

Bremen J. xovns, or BOSTON,

PATENT OFFICE.

MASSACHUSETTS, ASSIGNOR TO THAXTER N. TRIPP,

TRUSTEE, OF LYNN, ASSAGHISETTS.

PULP-SEPARATOR.

To all whom it may concern.-

Be it known that. I, BER-NICE J. Norms, of

- Boston, county of Suffolk, State of Massa- ,line mesh, upon whic Pulp-Separators, of which the following description, 1n connectlon with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to pulp se arators, especially adapted for separating the fibers and other paper forming ingredients, from the milk water of a paper-making machine.

The invention has for its object to conslruct a rotary separator of large capacity,

but of small dimensions, which requires but little power tooperate it; also, to provide means for drawing the water from the interior of the revolving separator, and, if desired, to produce a partial vacuum therein; also, to provide new and improved means for removing the fibers and other particles from the surface of the se arator.

Figure 1 shows an en view of a pulp separator embodying'this invention. Fig. 2 is a transverse vertical section of the pulp separator shown in Fig. 1. Fig. 3 is a longitudinal vertical section of the pulp separator shown in F ig. 1, taken on the dotted line Thepulp se arator comprises essentially a revoluble cy indrical screen, composed of circular ends or heads a a of an suitable diameter, having flanges a to which the edges of a screen a are secured. As a screen I prefer to employ a wire cloth of i is laid a piece of textile material, such for instance assilk or felt. The screen wirc if made substantial, gives a certain amount of rigidity to the cylinder and holds the textile material against inward movement when a partial vacuum is formed in the cylinder. The

cylindrical screen is arranged horizontally in a tank t, to which the milk water or other liquid to be separated is conveyed; and is mounted to revolve upon a stationary horizontal shaft b. For the purpose of revolving the cylindrical screen a toothed ring, c may be secured to one endor head which is engaged by a inion a, secured to a positively' driven s raft 0 ,01 any other suitable means may be employed for rotating it. The c lindrical screen is adapted to be partiall Specification of Letters Patent.

Application filed June 14,

y submerged in the milk water Patented March so, 1909. 1907. Serial No. 379,032.

-which is contained in the. tank, and the lwater passes through the screen, thereby entering the space within it, while the fibers chusetts, l1a\u-. ,1nvented an Improvement in and other particles collect upon the outside thereof.

For the purpose of drawing the water if desired, for producing: a partial vacuum therein to assist in drawing the water through the screen and for collecting the one or more, are arranged in' the screen, which extend downwardly, radlally from the stationary shaft upon wlnch the screen with the stationary shaft, and said shaft is made hollow at each end to provide passages thercthrough, communicatin with the downwardly' extended pi es. The hollow su port thus constructe at one or both en s,

equivalent device, not shown, by means of screen, and, if desired, a partial vacuum produced.

p The screen is revolved slowly, and the fibers and other particles collect on its exposed surface, and for the purpose of removing them, a pipe 2 extends lengthwise the having orifices arranged along one side of it, or it may be a very narrow slit, and said pipe device, not'shown, whereby jets of air are caused to forcibly issue from the orifices in the pipe. The pipe e is so arranged that the jets of air issuing from the orifice thereof, pass directly across the top of the exposed portion of the screen, in a tangential direction, and act to blow off the fibers and other particles which will have been collected thereon.

In case the partial vacuum which is formed in the cylindrical screen should be sufficient to hold the fibers and other particles on the surface of the screen with considerable force, means may be provided for eliminating the vacuum at the top of the exposed portion of the screen, where the jets of air strike it. To accomplish this result a long narrow chamber is formed on the inside of the screen, at the top of the exposed portion, which extends lengthwise and from end from theinterior of the screen, and also,-

fibers and other particles thereon, pipes d,'

is mounted, and said pipes are connected 3 which the water will be drawn from ,the

screen, at the top of its exposed portion,

will be connected with a suction pump or is adapted to be connected to an air pressure K and ends f, which are extended by strips of gagelthe for ejecting jets .of air across the top of the f connected to the centra cylindrical screen, or it may e otherwise the screen and also rubber and the latter are adapted to en- I interior of the screen wire. A substantially tight chamber isthus produced. The plate f is stationarily supported by arms su port of the orted. e apparatus herein shown may be put to various uses Having thus I claim as new and desire to secure by ters Patent is:-

1.' In a pulp drical screen adapted to be partially submerged in the liquid, means for drawing liquid from the interior of the screen, and means described my invention, what Letexposed portion of the screen, to remove the fibers and other particles therefrom, substantially as described.

2. In a pulp separator, a revoluble cylindrical screen adapted to be partially submerged in the liquid, means for revolving it, means for drawing liquid from the interior of the screen and also for producing a' partial vacuum therein and means for ejecting jets of air across the top of the exposed portion of the screen, to remove therefrom the fibers and other particles, substantially as described.

3. In a-pulp separator, a revoluble cylindrical screen adapted to be partially submerged in the liquid, means-for revolving it, means for drawing liquid from the interior of or producing a partial vacuum therein, means for ejecting ets of air across the top of the exposed portion of the screen, to remove therefrom the fibers and other particles, and means for eliminat-' separator, a revoluble cy ismear ing the vacuum at that part of the screen over which the jetsof air pass, substantially as described.

4. In a pulp separator, a revoluble cylindrical screen adapted to be partially submerged in the liquid, means for revolving it, means for drawin li uid from the interior of air across the top of the'exposedportion of the screen, to remove therefrom the fibers and other particles, anda stationary chamber contained within and extended len hortion of the exposed portion thereof which is engagedoby the jets of air, to revent the formation of a partial vacuum t stantially as described."

, 5. Ina pulp separator, a revoluble @ylin drical screen adapted to be partially submerged in the liquid, means for revolving it, means for 'drawmg liquid from its interior and for producinga partial vacuum therein, means for removing the fibers and other particles from the exposed portion'of the screen, a stationary chamber contained in and extended lengthwise the screen, disposed contiguous that portion of its exposed portion over which the fibers and other particles are being moved to revent the formation of a partial vacuum t ereat, substantially as described.

In testimony whereof, I have signed my two subscribing witnesses.

' YBERNICE J. NOYES.

I Witnesses:

' H. B. DAVIS,

DOYLE.

the screen and a 0 or producing a partial. vacuum therem, means for ejectmg ets of wise the screen, disposed contiguous t at name to this specification, in the presence of Y ereat, sub- 

